Amazing colorful ponds are located in the vicinity of San Francisco. These artificial ponds created for the extraction of salt by evaporating sea water. A color palette create algae and microorganisms. Moreover, the color of the pond indicates its degree of salinity. For example, ponds with low to medium salinity have color from pale green to deep pink corals. With increasing salinity in algae begins to dominate the red pigment. Also, the color of the waters affected by the weather. For example, heavy rain can change the hue or make the water very clear.